Unlearn Lesson #3: Mire yourself in expertise.

Ignorance is not the enemy of innovation: complacency is. Failing to recognize and adapt to change is tantamount to a death sentence, whether you’re a frog in a gradually warming pot of water or a business in the modern era.

The best ideas—true innovations— come from people working around the edges of their expertise. They know enough to be informed but not enough to be constrained by the “old way” of doing things.

I've named this approach the “Smart Stranger,” where fresh perspectives provoke new ideas.

Worth a re-read.